From: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
At the start of a rebase, ORIG_HEAD is updated to the tip of the
branch being rebased. Unfortunately reset_head() always uses the
current value of HEAD for this which is incorrect if the rebase is
started with "git rebase <upstream> <branch>" as in that case
ORIG_HEAD should be updated to <branch>. This only affects the "apply"
backend as the "merge" backend does not yet use reset_head() for the
initial checkout. Fix this by passing in orig_head when calling
reset_head() and add some regression tests.
Signed-off-by: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
---
builtin/rebase.c | 1 +
reset.c | 4 +++-
reset.h | 4 ++++
t/t3418-rebase-continue.sh | 26 ++++++++++++++++++++++++++
4 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/builtin/rebase.c b/builtin/rebase.c
index b55a9cff05d..e942c300f8c 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -1769,6 +1769,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
strbuf_addf(&msg, "%s: checkout %s",
getenv(GIT_REFLOG_ACTION_ENVIRONMENT), options.onto_name);
ropts.oid = &options.onto->object.oid;
+ ropts.orig_head = &options.orig_head,
ropts.flags = RESET_HEAD_DETACH | RESET_ORIG_HEAD |
RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
ropts.head_msg = msg.buf;
diff --git a/reset.c b/reset.c
index e02915c0f65..448cb3fd785 100644
--- a/reset.c
+++ b/reset.c
@@ -15,6 +15,7 @@ static int update_refs(const struct reset_head_opts *opts,
unsigned detach_head = opts->flags & RESET_HEAD_DETACH;
unsigned run_hook = opts->flags & RESET_HEAD_RUN_POST_CHECKOUT_HOOK;
unsigned update_orig_head = opts->flags & RESET_ORIG_HEAD;
+ const struct object_id *orig_head = opts->orig_head;
const char *switch_to_branch = opts->branch;
const char *reflog_branch = opts->branch_msg;
const char *reflog_head = opts->head_msg;
@@ -43,7 +44,8 @@ static int update_refs(const struct reset_head_opts *opts,
strbuf_addstr(&msg, "updating ORIG_HEAD");
reflog_orig_head = msg.buf;
}
- update_ref(reflog_orig_head, "ORIG_HEAD", head,
+ update_ref(reflog_orig_head, "ORIG_HEAD",
+ orig_head ? orig_head : head,
old_orig, 0, UPDATE_REFS_MSG_ON_ERR);
} else if (old_orig)
delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
diff --git a/reset.h b/reset.h
index 7ef7e43ea8c..a28f81829d8 100644
--- a/reset.h
+++ b/reset.h
@@ -22,6 +22,10 @@ struct reset_head_opts {
* The commit to checkout/reset to. Defaults to HEAD.
*/
const struct object_id *oid;
+ /*
+ * Optional value to set ORIG_HEAD. Defaults to HEAD.
+ */
+ const struct object_id *orig_head;
/*
* Optional branch to switch to.
*/
diff --git a/t/t3418-rebase-continue.sh b/t/t3418-rebase-continue.sh
index 22eca73aa3e..130e2f9b553 100755
--- a/t/t3418-rebase-continue.sh
+++ b/t/t3418-rebase-continue.sh
@@ -308,4 +308,30 @@ test_expect_success 'there is no --no-reschedule-failed-exec in an ongoing rebas
test_expect_code 129 git rebase --edit-todo --no-reschedule-failed-exec
'
+test_orig_head_helper () {
+ test_when_finished 'git rebase --abort &&
+ git checkout topic &&
+ git reset --hard commit-new-file-F2-on-topic-branch' &&
+ git update-ref -d ORIG_HEAD &&
+ test_must_fail git rebase "$@" &&
+ test_cmp_rev ORIG_HEAD commit-new-file-F2-on-topic-branch
+}
+
+test_orig_head () {
+ type=$1
+ test_expect_success "rebase $type sets ORIG_HEAD correctly" '
+ git checkout topic &&
+ git reset --hard commit-new-file-F2-on-topic-branch &&
+ test_orig_head_helper $type main
+ '
+
+ test_expect_success "rebase $type <upstream> <branch> sets ORIG_HEAD correctly" '
+ git checkout main &&
+ test_orig_head_helper $type main topic
+ '
+}
+
+test_orig_head --apply
+test_orig_head --merge
+
test_done
--
gitgitgadget
